Screen 충진 유동층 연소로의 동특성에 관한 연구

오광중; 홍성창; 최청송; 도동섭

HWAHAK KONGHAK, Vol.29, No.1, 55-62, February, 1991

Export Citation

Screen 충진 유동층 연소로의 동특성에 관한 연구

A Study on the Dynamic Behavior of Sereen Packed Fluidized Bed Combustor

오광중, 홍성창, 최청송, 도동섭

초록

내경이 6.7cm인, 충진 유동층 연소로의 동특성을 입자의 체재 시간 분포 곡선과 연소 온도 곡선을 이용하여 조사하였다. 연소에 사용된 유동화 입자는 크기가 균일하고 발열량이 3000kcal/kg이하의 저품위 무연탄을 사용하였으며 석탄 입자의 연소특성을 조사히기 위향 열분석을 행하였다. 충진 유동층 연소로에서 동특성을 고려하여 석탄 입자의 연소시 혼합영역과 확산영역으로 구분하여 연소모델을 제시하였다. 모델에 따르면 분급되어 상향하는 입자와 하향하는 입자들의 향류흐름에 의한 혼합효과는 석탄 고유의 발열량에 영향을 받으며 또한 연소되는 입자들의 분급효과가 높은 저품위 무연탄의 연소는 충진 유동층이 유리하다는 것을 알았다.

The dynamic behavior of a screen packed fluidized bed combustor of 6.7cm inside diameter was investigated by the residence time distribution and the temperature profile of combustion. The low grade anthracite coal(H.V.<3000kcal/kg) of uniform size was used in this experiment and the thermal analysis was performed in order to know the combustion characteristics of coal particles. Considering the dynamic behavior of the packed fluidized be combustor, a combustion model which was consisted of a mixed zone and a dispersed zone of particles was proposed. It was found from the model that the particle mixing, which was caused by the counter-current flow of particles was influenced by the heating value of coal and that a packed fluidized be was more effective for the combustion of low grade anthracite coal having high segregation effect of burning particles.

[References]

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[1] Park JH, Choi CS, Kang WK, Proceeding of PACHEC, Vol. III, 223 (1983)

[2] Sutherland JP, Vasilators G, Kubota H, AIChE J., 9, 437 (1963)

[3] Tone S, Oda I, Kawamura K, Otake T, J. Chem. Eng. Jpn., 5, 68 (1962)

[4] Gilliland ER, Mason EA, Ind. Eng. Chem., 41, 1191 (1949)

[5] Danckwerts PV, Chem. Eng. Sci., 2, 1 (1953)

[6] Wolf D, Resnick W, Ind. Eng. Chem. Fundam., 2, 287 (1963)

[7] Overcashier RH, Todd DB, Olney RB, AIChE J., 5, 54 (1959)

[8] Kang WK, Osberg GL, Can. J. Chem. Eng., 44, 142 (1966)

[9] 김익수, 고려대학교 석사학위 논문 (1985)

[10] Coats AW, Redfern JP, Nature, 201, 68 (1964)

[11] Serageldin MA, Pan WP, Thermochim. Acta, 71, 1 (1983)

[12] 황정의, 손무룡, 대한화학회지, 11, 1 (1967)

[13] Erdelyl A, Tables of Integral Transforms, 1, McGraw-Hill, 246 (1954)